How heat can help turn your immune system on

The use of heat in healing dates back to antiquity. It is reported that Hippocrates stated that “those who cannot be cured by medicine can be cured by surgery. Those who cannot be cured by surgery can be cured by fire [hyperthermia]. Those who cannot be cured by fire, they are indeed incurable.”[i]

The beneficial effects of fever-range temperatures on the immune system have been studied in depth through the years and appear to include: see pdf article by Dr Sandeep Gupta  link